AI Infrastructure and Architecture Engineer

Description

Founded in 2016, **Celcoin** is a pioneering infratech company in Brazil, specializing in providing financial technology infrastructure across payments, banking, and credit verticals. Our purpose? To empower businesses and transform access to financial services across the country; to achieve this, we connect over 600 financial sector clients and 6\.000 non-financial enterprises to millions of daily transactions. Join our team and contribute your best while learning and growing alongside us. This is Celcoin. **The best service for growth.** We have an opportunity for you to join our team, which leverages technology to deliver financial services. **About the team** We are building Celcoin's core AI technical unit. You will be responsible for designing and operating the scalable AI infrastructure supporting both internal applications and projects targeting corporate clients and end users. **Responsibilities and Duties** * Design and implement the company's AI infrastructure, including data pipelines, model orchestration, and training/inference environments. * Architect solutions based on LLMs, RAG, autonomous agents, vector databases, and MCP servers. * Ensure scalability, observability, security, and cost-efficiency of AI applications. * Define technical standards, internal libraries, and best practices for AI usage across the company. * Provide deep technical support for projects targeting corporate clients and end users, contributing to API, SDK, and native AI capability design. * Collaborate with Data, Engineering, Security, and Product teams to integrate AI into critical workflows. * Continuously evaluate the ecosystem of models, frameworks, and tools, proposing architectural improvements. * Ensure architecture compliance with regulatory requirements (LGPD, BACEN) and internal governance policies. **Requirements and Qualifications** * Experience in software engineering, ML, MLOps, or related fields. * Strong proficiency in Python and/or languages such as Go or Rust. * Practical experience with LLMs (OpenAI, Anthropic, open\-source models), including fine\-tuning, RAG, and prompt engineering. * Hands-on experience with cloud infrastructure (AWS, GCP, or Azure) and containerized environments (Docker, Kubernetes). * Knowledge of event-driven architectures, microservices, and RESTful/GraphQL APIs. * Familiarity with modern data platforms (Snowflake, BigQuery, Databricks). * Experience implementing observability (logs, metrics, traces) in mission-critical applications. * Security awareness applied to AI systems: access control, isolation, prevention of data leakage. * Ability to navigate between coding, architecture, and business stakeholder discussions. **Nice-to-have** * Prior experience in fintechs or regulated financial environments. * Contributions to open\-source AI or ML projects. * Knowledge of vector databases (Pinecone, Weaviate, pgvector, Qdrant). * Experience with agent orchestration frameworks (LangChain, LlamaIndex, Semantic Kernel, or equivalents). * Experience with MCP (Model Context Protocol) or equivalent agent-tool integration standards. * Familiarity with responsible AI practices and model governance. * Background in products targeting external customers. **Additional Information** **CLT employment contract** **Working hours**: Monday to Friday, from 09:00 to 18:00 This is a **Hybrid position in São Paulo \- SP** * **Meal/Voucher Allowance (VR/VA)** provided via iFood Benefits; * **Transportation Voucher**; * **Bradesco Health and Dental Insurance**, fully covered for employees (with optional dependent coverage at co-payment); * **Life Insurance**; * **Wellhub**; * **Zenklub**; * **Annual Variable Compensation** (tied to company goals); * **Childcare Assistance**, covering children up to 5 years old; * **Birthday Day Off**; * **Partnerships with language schools and universities**; * **Pharmacy Discount Program**; * **PetLove** (discounts on pet health plans for dogs and cats); * **SESC Partnership**; * **Onhappy Partnership** for travel; * **We are a Citizen Company**, offering extended maternity leave of 180 days and paternity leave of 20 days.